[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / input / gameport / lightning.c

/*
 *  Copyright (c) 1998-2001 Vojtech Pavlik
 */

/*
 * PDPI Lightning 4 gamecard driver for Linux.
 */

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * Should you need to contact me, the author, you can do so either by
 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
 */

#include <asm/io.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/gameport.h>

#define L4_PORT			0x201
#define L4_SELECT_ANALOG	0xa4
#define L4_SELECT_DIGITAL	0xa5
#define L4_SELECT_SECONDARY	0xa6
#define L4_CMD_ID		0x80
#define L4_CMD_GETCAL		0x92
#define L4_CMD_SETCAL		0x93
#define L4_ID			0x04
#define L4_BUSY			0x01
#define L4_TIMEOUT		80	/* 80 us */

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION("PDPI Lightning 4 gamecard driver");
MODULE_LICENSE("GPL");

struct l4 {
	struct gameport *gameport;
	unsigned char port;
};

static struct l4 l4_ports[8];

/*
 * l4_wait_ready() waits for the L4 to become ready.
 */

static int l4_wait_ready(void)
{
	unsigned int t = L4_TIMEOUT;

	while ((inb(L4_PORT) & L4_BUSY) && t > 0) t--;
	return -(t <= 0);
}

/*
 * l4_cooked_read() reads data from the Lightning 4.
 */

static int l4_cooked_read(struct gameport *gameport, int *axes, int *buttons)
{
	struct l4 *l4 = gameport->port_data;
	unsigned char status;
	int i, result = -1;

	outb(L4_SELECT_ANALOG, L4_PORT);
	outb(L4_SELECT_DIGITAL + (l4->port >> 2), L4_PORT);

	if (inb(L4_PORT) & L4_BUSY) goto fail;
	outb(l4->port & 3, L4_PORT);

	if (l4_wait_ready()) goto fail;
	status = inb(L4_PORT);

	for (i = 0; i < 4; i++)
		if (status & (1 << i)) {
			if (l4_wait_ready()) goto fail;
			axes[i] = inb(L4_PORT);
			if (axes[i] > 252) axes[i] = -1;
		}

	if (status & 0x10) {
		if (l4_wait_ready()) goto fail;
		*buttons = inb(L4_PORT) & 0x0f;
	}

	result = 0;

fail:	outb(L4_SELECT_ANALOG, L4_PORT);
	return result;
}

static int l4_open(struct gameport *gameport, int mode)
{
	struct l4 *l4 = gameport->port_data;

        if (l4->port != 0 && mode != GAMEPORT_MODE_COOKED)
		return -1;
	outb(L4_SELECT_ANALOG, L4_PORT);
	return 0;
}

/*
 * l4_getcal() reads the L4 with calibration values.
 */

static int l4_getcal(int port, int *cal)
{
	int i, result = -1;

	outb(L4_SELECT_ANALOG, L4_PORT);
	outb(L4_SELECT_DIGITAL + (port >> 2), L4_PORT);
	if (inb(L4_PORT) & L4_BUSY)
		goto out;

	outb(L4_CMD_GETCAL, L4_PORT);
	if (l4_wait_ready())
		goto out;

	if (inb(L4_PORT) != L4_SELECT_DIGITAL + (port >> 2))
		goto out;

	if (l4_wait_ready())
		goto out;
        outb(port & 3, L4_PORT);

	for (i = 0; i < 4; i++) {
		if (l4_wait_ready())
			goto out;
		cal[i] = inb(L4_PORT);
	}

	result = 0;

out:	outb(L4_SELECT_ANALOG, L4_PORT);
	return result;
}

/*
 * l4_setcal() programs the L4 with calibration values.
 */

static int l4_setcal(int port, int *cal)
{
	int i, result = -1;

	outb(L4_SELECT_ANALOG, L4_PORT);
	outb(L4_SELECT_DIGITAL + (port >> 2), L4_PORT);
	if (inb(L4_PORT) & L4_BUSY)
		goto out;

	outb(L4_CMD_SETCAL, L4_PORT);
	if (l4_wait_ready())
		goto out;

	if (inb(L4_PORT) != L4_SELECT_DIGITAL + (port >> 2))
		goto out;

	if (l4_wait_ready())
		goto out;
        outb(port & 3, L4_PORT);

	for (i = 0; i < 4; i++) {
		if (l4_wait_ready())
			goto out;
		outb(cal[i], L4_PORT);
	}

	result = 0;

out:	outb(L4_SELECT_ANALOG, L4_PORT);
	return result;
}

/*
 * l4_calibrate() calibrates the L4 for the attached device, so
 * that the device's resistance fits into the L4's 8-bit range.
 */

static int l4_calibrate(struct gameport *gameport, int *axes, int *max)
{
	int i, t;
	int cal[4];
	struct l4 *l4 = gameport->port_data;

	if (l4_getcal(l4->port, cal))
		return -1;

	for (i = 0; i < 4; i++) {
		t = (max[i] * cal[i]) / 200;
		t = (t < 1) ? 1 : ((t > 255) ? 255 : t);
		axes[i] = (axes[i] < 0) ? -1 : (axes[i] * cal[i]) / t;
		axes[i] = (axes[i] > 252) ? 252 : axes[i];
		cal[i] = t;
	}

	if (l4_setcal(l4->port, cal))
		return -1;

	return 0;
}

static int __init l4_create_ports(int card_no)
{
	struct l4 *l4;
	struct gameport *port;
	int i, idx;

	for (i = 0; i < 4; i++) {

		idx = card_no * 4 + i;
		l4 = &l4_ports[idx];

		if (!(l4->gameport = port = gameport_allocate_port())) {
			printk(KERN_ERR "lightning: Memory allocation failed\n");
			while (--i >= 0) {
				gameport_free_port(l4->gameport);
				l4->gameport = NULL;
			}
			return -ENOMEM;
		}
		l4->port = idx;

		port->port_data = l4;
		port->open = l4_open;
		port->cooked_read = l4_cooked_read;
		port->calibrate = l4_calibrate;

		gameport_set_name(port, "PDPI Lightning 4");
		gameport_set_phys(port, "isa%04x/gameport%d", L4_PORT, idx);

		if (idx == 0)
			port->io = L4_PORT;
	}

	return 0;
}

static int __init l4_add_card(int card_no)
{
	int cal[4] = { 255, 255, 255, 255 };
	int i, rev, result;
	struct l4 *l4;

	outb(L4_SELECT_ANALOG, L4_PORT);
	outb(L4_SELECT_DIGITAL + card_no, L4_PORT);

	if (inb(L4_PORT) & L4_BUSY)
		return -1;
	outb(L4_CMD_ID, L4_PORT);

	if (l4_wait_ready())
		return -1;

	if (inb(L4_PORT) != L4_SELECT_DIGITAL + card_no)
		return -1;

	if (l4_wait_ready())
		return -1;
	if (inb(L4_PORT) != L4_ID)
		return -1;

	if (l4_wait_ready())
		return -1;
	rev = inb(L4_PORT);

	if (!rev)
		return -1;

	result = l4_create_ports(card_no);
	if (result)
		return result;

	printk(KERN_INFO "gameport: PDPI Lightning 4 %s card v%d.%d at %#x\n",
		card_no ? "secondary" : "primary", rev >> 4, rev, L4_PORT);

	for (i = 0; i < 4; i++) {
		l4 = &l4_ports[card_no * 4 + i];

		if (rev > 0x28)		/* on 2.9+ the setcal command works correctly */
			l4_setcal(l4->port, cal);
		gameport_register_port(l4->gameport);
	}

	return 0;
}

static int __init l4_init(void)
{
	int i, cards = 0;

	if (!request_region(L4_PORT, 1, "lightning"))
		return -EBUSY;

	for (i = 0; i < 2; i++)
		if (l4_add_card(i) == 0)
			cards++;

	outb(L4_SELECT_ANALOG, L4_PORT);

	if (!cards) {
		release_region(L4_PORT, 1);
		return -ENODEV;
	}

	return 0;
}

static void __exit l4_exit(void)
{
	int i;
	int cal[4] = { 59, 59, 59, 59 };

	for (i = 0; i < 8; i++)
		if (l4_ports[i].gameport) {
			l4_setcal(l4_ports[i].port, cal);
			gameport_unregister_port(l4_ports[i].gameport);
		}

	outb(L4_SELECT_ANALOG, L4_PORT);
	release_region(L4_PORT, 1);
}

module_init(l4_init);
module_exit(l4_exit);
Commit	Line	Data
1da177e4	1	/*
1da177e4 LT	2	* Copyright (c) 1998-2001 Vojtech Pavlik
	3	*/
	4
	5	/*
	6	* PDPI Lightning 4 gamecard driver for Linux.
	7	*/
	8
	9	/*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License as published by
	12	* the Free Software Foundation; either version 2 of the License, or
	13	* (at your option) any later version.
	14	*
	15	* This program is distributed in the hope that it will be useful,
	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	* GNU General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public License
	21	* along with this program; if not, write to the Free Software
	22	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	23	*
	24	* Should you need to contact me, the author, you can do so either by
	25	* e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
	26	* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
	27	*/
	28
	29	#include <asm/io.h>
	30	#include <linux/delay.h>
	31	#include <linux/errno.h>
	32	#include <linux/ioport.h>
	33	#include <linux/kernel.h>
	34	#include <linux/module.h>
	35	#include <linux/init.h>
	36	#include <linux/gameport.h>
1da177e4 LT	37
	38	#define L4_PORT 0x201
	39	#define L4_SELECT_ANALOG 0xa4
	40	#define L4_SELECT_DIGITAL 0xa5
	41	#define L4_SELECT_SECONDARY 0xa6
	42	#define L4_CMD_ID 0x80
	43	#define L4_CMD_GETCAL 0x92
	44	#define L4_CMD_SETCAL 0x93
	45	#define L4_ID 0x04
	46	#define L4_BUSY 0x01
	47	#define L4_TIMEOUT 80 /* 80 us */
	48
	49	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	50	MODULE_DESCRIPTION("PDPI Lightning 4 gamecard driver");
	51	MODULE_LICENSE("GPL");
	52
	53	struct l4 {
	54	struct gameport *gameport;
	55	unsigned char port;
	56	};
	57
	58	static struct l4 l4_ports[8];
	59
	60	/*
	61	* l4_wait_ready() waits for the L4 to become ready.
	62	*/
	63
	64	static int l4_wait_ready(void)
	65	{
	66	unsigned int t = L4_TIMEOUT;
	67
	68	while ((inb(L4_PORT) & L4_BUSY) && t > 0) t--;
	69	return -(t <= 0);
	70	}
	71
	72	/*
	73	* l4_cooked_read() reads data from the Lightning 4.
	74	*/
	75
	76	static int l4_cooked_read(struct gameport gameport, int axes, int *buttons)
	77	{
	78	struct l4 *l4 = gameport->port_data;
	79	unsigned char status;
	80	int i, result = -1;
	81
	82	outb(L4_SELECT_ANALOG, L4_PORT);
	83	outb(L4_SELECT_DIGITAL + (l4->port >> 2), L4_PORT);
	84
	85	if (inb(L4_PORT) & L4_BUSY) goto fail;
	86	outb(l4->port & 3, L4_PORT);
	87
	88	if (l4_wait_ready()) goto fail;
	89	status = inb(L4_PORT);
	90
	91	for (i = 0; i < 4; i++)
	92	if (status & (1 << i)) {
	93	if (l4_wait_ready()) goto fail;
	94	axes[i] = inb(L4_PORT);
	95	if (axes[i] > 252) axes[i] = -1;
	96	}
	97
	98	if (status & 0x10) {
	99	if (l4_wait_ready()) goto fail;
	100	*buttons = inb(L4_PORT) & 0x0f;
101	}
102
103	result = 0;
104
105	fail: outb(L4_SELECT_ANALOG, L4_PORT);
106	return result;
107	}
108
109	static int l4_open(struct gameport *gameport, int mode)
110	{
111	struct l4 *l4 = gameport->port_data;
112
113	if (l4->port != 0 && mode != GAMEPORT_MODE_COOKED)
114	return -1;
115	outb(L4_SELECT_ANALOG, L4_PORT);
116	return 0;
117	}
118
119	/*
120	* l4_getcal() reads the L4 with calibration values.
121	*/
122
123	static int l4_getcal(int port, int *cal)
124	{
125	int i, result = -1;
126
127	outb(L4_SELECT_ANALOG, L4_PORT);
128	outb(L4_SELECT_DIGITAL + (port >> 2), L4_PORT);
129	if (inb(L4_PORT) & L4_BUSY)
130	goto out;
131
132	outb(L4_CMD_GETCAL, L4_PORT);
133	if (l4_wait_ready())
134	goto out;
135
136	if (inb(L4_PORT) != L4_SELECT_DIGITAL + (port >> 2))
137	goto out;
138
139	if (l4_wait_ready())
140	goto out;
141	outb(port & 3, L4_PORT);
142
143	for (i = 0; i < 4; i++) {
144	if (l4_wait_ready())
145	goto out;
146	cal[i] = inb(L4_PORT);
147	}
148
149	result = 0;
150
151	out: outb(L4_SELECT_ANALOG, L4_PORT);
152	return result;
153	}
154
155	/*
156	* l4_setcal() programs the L4 with calibration values.
157	*/
158
159	static int l4_setcal(int port, int *cal)
160	{
161	int i, result = -1;
162
163	outb(L4_SELECT_ANALOG, L4_PORT);
164	outb(L4_SELECT_DIGITAL + (port >> 2), L4_PORT);
165	if (inb(L4_PORT) & L4_BUSY)
166	goto out;
167
168	outb(L4_CMD_SETCAL, L4_PORT);
169	if (l4_wait_ready())
170	goto out;
171
172	if (inb(L4_PORT) != L4_SELECT_DIGITAL + (port >> 2))
173	goto out;
174
175	if (l4_wait_ready())
176	goto out;
177	outb(port & 3, L4_PORT);
178
179	for (i = 0; i < 4; i++) {
180	if (l4_wait_ready())
181	goto out;
182	outb(cal[i], L4_PORT);
183	}
184
185	result = 0;
186
187	out: outb(L4_SELECT_ANALOG, L4_PORT);
188	return result;
189	}
190
191	/*
192	* l4_calibrate() calibrates the L4 for the attached device, so
193	* that the device's resistance fits into the L4's 8-bit range.
194	*/
195
196	static int l4_calibrate(struct gameport gameport, int axes, int *max)
197	{
198	int i, t;
199	int cal[4];
200	struct l4 *l4 = gameport->port_data;
201
202	if (l4_getcal(l4->port, cal))
203	return -1;
204
205	for (i = 0; i < 4; i++) {
206	t = (max[i] * cal[i]) / 200;
207	t = (t < 1) ? 1 : ((t > 255) ? 255 : t);
208	axes[i] = (axes[i] < 0) ? -1 : (axes[i] * cal[i]) / t;
209	axes[i] = (axes[i] > 252) ? 252 : axes[i];
210	cal[i] = t;
211	}
212
213	if (l4_setcal(l4->port, cal))
214	return -1;
215
216	return 0;
217	}
218
219	static int __init l4_create_ports(int card_no)
220	{
221	struct l4 *l4;
222	struct gameport *port;
223	int i, idx;
224
225	for (i = 0; i < 4; i++) {
226
227	idx = card_no * 4 + i;
228	l4 = &l4_ports[idx];
229
230	if (!(l4->gameport = port = gameport_allocate_port())) {
231	printk(KERN_ERR "lightning: Memory allocation failed\n");
232	while (--i >= 0) {
233	gameport_free_port(l4->gameport);
234	l4->gameport = NULL;
235	}
236	return -ENOMEM;
237	}
238	l4->port = idx;
239
240	port->port_data = l4;
241	port->open = l4_open;
242	port->cooked_read = l4_cooked_read;
243	port->calibrate = l4_calibrate;
244
245	gameport_set_name(port, "PDPI Lightning 4");
246	gameport_set_phys(port, "isa%04x/gameport%d", L4_PORT, idx);
247
248	if (idx == 0)
249	port->io = L4_PORT;
250	}
251
252	return 0;
253	}
254
255	static int __init l4_add_card(int card_no)
256	{
257	int cal[4] = { 255, 255, 255, 255 };
258	int i, rev, result;
259	struct l4 *l4;
260
261	outb(L4_SELECT_ANALOG, L4_PORT);
262	outb(L4_SELECT_DIGITAL + card_no, L4_PORT);
263
264	if (inb(L4_PORT) & L4_BUSY)
265	return -1;
266	outb(L4_CMD_ID, L4_PORT);
267
268	if (l4_wait_ready())
269	return -1;
270
271	if (inb(L4_PORT) != L4_SELECT_DIGITAL + card_no)
272	return -1;
273
274	if (l4_wait_ready())
275	return -1;
276	if (inb(L4_PORT) != L4_ID)
277	return -1;
278
279	if (l4_wait_ready())
280	return -1;
281	rev = inb(L4_PORT);
282
283	if (!rev)
284	return -1;
285
286	result = l4_create_ports(card_no);
287	if (result)
288	return result;
289
290	printk(KERN_INFO "gameport: PDPI Lightning 4 %s card v%d.%d at %#x\n",
291	card_no ? "secondary" : "primary", rev >> 4, rev, L4_PORT);
292
293	for (i = 0; i < 4; i++) {
294	l4 = &l4_ports[card_no * 4 + i];
295
296	if (rev > 0x28) /* on 2.9+ the setcal command works correctly */
297	l4_setcal(l4->port, cal);
298	gameport_register_port(l4->gameport);
299	}
300
301	return 0;
302	}
303
304	static int __init l4_init(void)
305	{
306	int i, cards = 0;
307
308	if (!request_region(L4_PORT, 1, "lightning"))
6a89bc00	309	return -EBUSY;
1da177e4 LT	310
	311	for (i = 0; i < 2; i++)
	312	if (l4_add_card(i) == 0)
	313	cards++;
	314
	315	outb(L4_SELECT_ANALOG, L4_PORT);
	316
	317	if (!cards) {
	318	release_region(L4_PORT, 1);
6a89bc00	319	return -ENODEV;
1da177e4 LT	320	}
	321
	322	return 0;
	323	}
	324
	325	static void __exit l4_exit(void)
	326	{
	327	int i;
	328	int cal[4] = { 59, 59, 59, 59 };
	329
	330	for (i = 0; i < 8; i++)
	331	if (l4_ports[i].gameport) {
	332	l4_setcal(l4_ports[i].port, cal);
	333	gameport_unregister_port(l4_ports[i].gameport);
	334	}
	335
	336	outb(L4_SELECT_ANALOG, L4_PORT);
	337	release_region(L4_PORT, 1);
	338	}
	339
	340	module_init(l4_init);
	341	module_exit(l4_exit);